NEW YORK--(BUSINESS WIRE)--The following statement is being issued by Levi & Korsinsky, LLP:

To: All Persons or Entities who purchased Guaranty Bancor (“Guaranty
Bancor” or the “Company”) (NASDAQGS:GBNK) stock prior
to May 22, 2018.

You are hereby notified that Levi & Korsinsky, LLP has commenced
an investigation into the fairness of the sale
of Guaranty Bancor to Independent Bank Group, Inc. (NASDAQGS: IBTX).
Under the terms of the transaction, Guaranty Bancor shareholders will
receive 0.45 shares of Independent Bank Group for each share of Guaranty
Bancor stock they own. Based on the closing price of Independent Bank
Group on May 21, 2018, this represents a value of approximately $35.37
per Guaranty Bancor share. To learn more about the action and your
rights, go to:

or contact Joseph E. Levi, Esq. either via email at jlevi@levikorsinsky.com or
by telephone at (212) 363-7500, toll-free: (877) 363-5972. There
is no cost or obligation to you.

The investigation concerns whether the Board of Guaranty Bancor breached
their fiduciary duties to stockholders by failing to adequately shop the
Company before agreeing to enter into this transaction, and whether
Independent Bank Group, Inc. is underpaying for Guaranty Bancor shares,
thus unlawfully harming Guaranty Bancor shareholders.

Levi & Korsinsky is a national firm with offices in New York,
Connecticut, California, and Washington D.C. The firm's attorneys have
extensive expertise in prosecuting securities litigation involving
financial fraud, representing investors throughout the nation in
securities lawsuits and have recovered hundreds of millions of
dollars for aggrieved shareholders. For more information, please
feel free to contact any of the attorneys listed below. Attorney
advertising. Prior results do not guarantee similar outcomes.